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NOV. 20, 1923 v 1,475,032 F. J. SHRUM ET AL MECHANISM FOR MAKING THREADPROTECTORS Filed July 15 1922 I 5 Sheets-Sheet l QJfi vENroRs 5Sheets-Sheet 3 mm A a ll. AN Z 5R P. J. SHRUM ET AL.

MECHANISM FOR MAKING THREAD PROTECTORS I Nov. 20 1923 Filed July 15 1922Nov. 20, 1923 L 3? ,3

P. J. SHRUM ET AL MECHANISM FOR MAKING THREAD PROTECTORS Filed July 151922 3 Sheets fihee'b 5 2 Q QZA dA LW Patented Nov. 20, 1923.

UNITED STATES PATENT OFFICE- P ETER J. SERUM, OF MONACA HEIGHTS, ANDHAROLD A. I-IENIGEN, OF ROCHESTER,

PENNSYLVANIA, ASSIGNGRS TO COLON/ ft MANUFACTURING- COMPANY, OF PIT-TS-BURGH, PENNSYLVANIA, A CORPORATIGH OF PENNSYLVANIA.

MECHANISM FOR MAKING THREAD PROTECTORS.

Application filed July 15,

To all whom it may concern:

Be it known that we, PETER J. SHRUM and HAROLD A. I-lnNIenN, citizens ofthe United States, residing at Monaca Heights and Rochester,respectively, in the county of Beaver and State of Pennsylvania, haveinvented certain new and useful Improvements in Mechanism for MakingThread Protectors, of which the following is a specification.

Our invention consists of mechanism for making thread protectors orsimilar articles from cylindrical blanks or sections of metal tubing,utilizing pressing and forming dies. It has for its object to t'orm theblank into shape, ready for threading, in one operation, and todischarge it for removal. The resulting blank is of generallycylindrical form, having a middle threaded body portion, an. outwardlyrounded inwardly deflected outer terminal, and an inner outwardlyextended coping, as hereinafter described.

The device is formed from a section of tubing, either seamless orwelded,by an up setting and swaging operation, whereby to press theblank by its lower end against a bottom crimping die to turn its edgeinwardly in rounded form, and then by lateral pressure to swage themiddle portion inwardly, increasing the density of the thread engagingportion at the same time, slightly reducing it in diameter, and tooutwardly flare or expand the other end, as hereinafter more fullydescribed.

In the drawings,

Fig. 1 is a sectional view of the dies and portions of their operatingmechanism, open, with the tubular blank in position;

Fig. 2 is a similar view with all of the dies in closed position at thebottom of the stroke;

Fig. 3 is a similar view showingthe dies in position in ejecting thefinished pressed article;

Fig. at is a plan view showing the arrangement of the upper outerformingdies;

.Fig. 5 is a sectional View showing the finished protector in positiononthe end of a pipe.

The apparatus is adapted to be used in connection with a power presshaving a bottom block 2 and an uppervertically movable head 3andadischarge. cam or similar 1922. Serial No. 575,167.

device 4:. Upon a block 2 is secured by screw or bolt 5, the stationarybottom die 6 having an annular groove 7 rounded inwardly toward an innerupwardly extending annular shoulder 8. The function of such die is toreceive the lower end of the blank and to crimp it inwardly by downwardpressure, forming the terminal limiting fiange 7) of the protector.

The upper composite die consists of a rectangular plate 9 which issecured to the reciprocable head 3 of the press in any suitable way, bybolts, and which is provided with a centrally inserted bushing orthimble bearing 10 for guiding the stem ll of plunger die 12. The latteris normally held in retracted position up against the bottom of plate'9by an upper lateral flange 13 seated in a central recess in plate 9 andextending over the upper inwardly extending edges '14: of the severallaterally movable reciprocable side dies 15, hereinafter described.

Stem 11 extends down through die 12 and in shouldered and rivetedconnection with the bottom ejecting die 16, as at 17. The latter die iscircular and is normally held up against the bottom of circular die 12,with which it corresponds in diameter, by a spring 18 engagingunderneath head 19 of stem 11, as in Fig. 1.

Side dies 15 are inquarter sections, forming when closed an outer ringconcentric with center die 12, and providing the intervening annularspace for the blank. They fit within the circular outwardly flaringcontinuous wedge face 20 of integral wedge ring 21, which is securedunderneath plate 9 by bolts 22, as shown. Quarter section dies 15 areheld upwardly against plate 9 by series of bolts 23, parallel with thewedge face 20 and having heads 24 hearing on cushioning springs 25seated in receiving cavities in theupper portions 0t plate 9. By thismounting, the sectional dies 15 are capable of independent downward andoutward movement around the upper portionof the blank, in loweringthereon, and of re-acting movement for side swaging by the confinactionotthe wedge faces 20 of die 21 at the latter portion of the stroke.

The relatively movable quarter section dies 15 are rounded attheir innerlower portions as at 26, for the purpose of embracing engagement withthe upper edge port-ions of the blank a, in downward movement, and areprovided with upwardly extending vertical and annular faces 27 extendingto about the middle portion of the die. The face of the die is inwardlyrecessed, as at 28, providing an annular enlargement which merges intothe terminal straight face 29, somewhat offset outwardly from thediametrical contour of lower faces 27.

The purpose of such construction of the inner faces of dies 15 is toprovide ample clearance for the outwardly formed metal of the blank inpassing between the center plunger die 12 and the outer relativelymovable die sections 15, in downward movement of the composite dies overthe blank a. The several sectional dies 15 are provided with theinwardly extending terminal edges or flanges 14 which, in tiie normalposition of the dies, as in Fig. 1, provide terminating closures for theblank forming cavity, while at the same time, providing for supportingengagement with the upper flange 13 of plunger die 12.

Said die is of a diameter at its lower portion sulliciently less thanthat of the normal internal diameter of faces 27 to provide for theintervening space corresponding substantially to the thickness of blanka. For such purpose, the lowcrdiametrical annular face 30 of die 12extends forwardly to a point opposite to or slightly above theshouldered offset of faces 27, at which point the peripheral face of die12 is laterally enlarged by means of an annular shoulder 31, upwardlybeyond which the enlarged annular face 32 of the die extends to theflange 13.

By this construction and arrangement, a continuous intervening annularclearance space is provided, whereby to effect an outer enlargingswaging action on the upper porton of the blank in lowering thecomposite dies under pressure and the annular clearance cavity at 28 isslightly enlarged, as shown, so as to facilitate the swaging action informing the blank (4 by downward pressure, assisted by the lateralmovement of the sectional dies 15.

Thus, -in operation, the blank (0 being inserted in the lower die 6, ashown, with its lower edges inserted in the annular rounded cavity 7,downward movement of plate 9, outer ring 21, and the series of sectionaldies 15, together with the central plunger die 12, will come intoembracing engagement with the upper portion of the blank, and as theseries of dies descend, the sectional dies 15 will slightly expand byreason of the wedge faces 21, dies 15 traveling downwardly at a slightlygreater speed than the normal lowering speed, and with correspondinglateral movement, as in the position shown in Fig. 3.

Such operation will continue until dies 15. in addition to ring 21, comeinto contact with the upper outer face ofstationary lower die 6. At suchpoint, flanges i l will also have come into contact with the upper edgeof the blank, and dles 15 being thus arrested, continued downwardmovement of ring 21 will operate to force dies 15 inwardly during theremainder of the stroke. In such position, sectional dies 15 will havebeen forced inwardly their initial relative position, and faces 2. willhave )lGSSGd the middle portion of the blank a inwardly against theannular face 30 of plunger die 12, faces 29 of the sectional dies at thesame time pressing the upper portion of the blank inwardly against faceslit the same time, the shouldered portions of said coacting dies willhave effected the formation of the shoulder 0 of the blank and itsterminal laterally extending end d.

'lhereupon, the blank having been formed into its desired shape, plate 9is retracted by operation of the press through the crank, eccentric, orother element utilized, ring 21 at the same time rising, plunger die 12being lifted simultaneously to the same degree. On the other hand, stem11 is temporarily held in its lower position by action of cam a, so thatejecting die 16 is temporarily held in its lowered position and by itsperipheral edges engages the inwardly turned flange 6 of the formedblank Such engagement continues during the full upward movement of theplate 9 and the outer dies to release the blank.

in their upward movement, sectional dies 15 are free to expand in thesame manner as in lowering, so as to pass outwardly sufficiently far toprovide for clearance of the enlarged upper portion (Z, as in Fig. 3.Thereafter, cam 1 having been released from its pressing action againstthe head 19 of stem 11, spring '18 w ll effect retraction thereof,raising ejecting die 16 and plunger die 12 to their normal position,ready for the next operation.

The finished blank havingthen been removed, the machine is ready forinsertion of another blank, whereupon, the operation above described isrepeated.

We claim as our invention:

1. Mechanism for making thread protectors comprising a pressing plungerand a block arranged in proper relation with each other for operation ona tubular blank, means on said plunger for applying a lon gitudinalpressure on the blank, and means on the plunger for applying radialpressure, and means for simultaneously crimping the end of the blankinwardly.

2. Mechanism for making thread protectors comprising a pressing plungerand a block arranged in proper relation with each other for cooperativeengagement on a tu bular blank, means on said plunger for apltll) plyinga longitudinal pressure to the blank, and means on the plunger forapplying a radial pressure to a part of the blank to decrease itsdiameter and upset the metal, and means for simultaneously crimping theend or the blank inwardly.

3. Mechanism for making thread protectors comprising a pressing plungerand a block arranged in proper relation with each other for cooperativeengagement on a tubular blank, means on said plunger for ap plying alongitudinal pressure to the blank, means on the plunger for applying aradial pressure to a part of the blank intermediate its ends to decreasethe diameter of such part and increase the thickness oi the metal atthat part, and means on the block for forming an annular bead adjacentthe contracted intermediate part of the blank and for turning the end ofthe blank at which the head is "formed inwardly.

4t. Mechanism for making thread protectors comprising a pressing plungerand a block arranged in proper relation with each other for cooperativeengagement on a tubular blank, means on said plunger for applying alongitudinal pressure to the blank, means on the plunger for applying aradial pressure to a part of the blank intermediate the ends thereof tocontract it, means on the plunger for forming an annular bead and atubular extension at one side o1": said contracted intermediate part,and means on the block for forming a bead and an inwardly turned end atthe other side of said contracted intermediate part of the blank.

Mechanism for making thread protectors comprising a pressing plunger anda block arranged in proper relation with each other for cooperativeengagement on a tubular blank, means on said plunger for applying alongitudinal pressure to the blank, means on the plunger for applying aradial pressure to a part of the blank intermediate the ends thereof tocontract it, means on the. plunger for forming an annular bead and atubular extension at one side of said concted intermediate part, andmeans on the clock for forming a bead and an inwardly turned end at theother side of said c0niracted intermediate part of the blank, said meanson the plunger and block being arranged to effect all of said operationsat a single reciprocation or the plunger.

(1. Mechanism for forming thread protectors from a tubular blankcomprising a lateral movement of said laterally movable V 1, ecn satmembers and said plate using iechanism for forming thread pr0tec torsfrom tubular blankcomprising a block and a reciprocable plunger, saidplunger comprising a main plate having a die member on its lower faceadapted to be projected into a blank, laterally movable pressing membersaround said die and spaced therefrom and movable vertically relativelyto the main plate for applying lateral pressure to the blank, means foreti ecting a lateral movement of said laterally movable pressing membersupon a relative movement between said members and said plate beingeffected, and means on the plunger and block for subjecting a blank toendwise pressure during the same operation of the press that subjectsthe blank to lateral pressure.

8. Mechanism for forming thread protectors from tubular blankscomprising .a block and a reciprocable plunger, said plun ger comprisinga main pressing plate, a die on the under surface thereof, movablevertically relatively to the pressing plate, laterally movable pressingmembers surround ing the die and having means thereon for moving saiddie vertically, said laterally movable pressing members being suspendedfrom said plate in such manner as to be movable vertically relativelythereto, and cooperating means on said plate against which saidlaterally movable pressing members slide for effecting a lateralmovement of said members upon relative vertical movement occurringbetween the plate and said laterally movable pressing members.

9. Mechanism for forming thread protectors from tubular blankscomprising a block on which the blanks be supported, a composite plungerin cooperative relation with ldlc; block having a die adapted to beprojected into a blank when one is on the blo laterally movablepressingmembers on is plunger for contracting the blank, mea s on theplunger for subjecting the blain: to longitudinal pressure against theblock. means on said block for causing the end of the blank to curlinwardly under such pressure, and an independently operated slippingmember under said die for holding said blank on the block after theblank has been subjected to lateral and longitudinal pressures and whilethe die and lateral pressing means are being moved out of engagementwith the blank.

in testimony whereof we hereunto aflix our signatures.

PETER J, SERUM. HAROLD A. HENIGEN,

